"The Eight Parts of the Dragon".

The earliest source of the sentence "Flying flowers and picking leaves can hurt people" is Jin Yong's famous work "The Eight Parts of the Dragon". In the play, Murong Fu said this famous saying when he killed people randomly when he was suffering from madness. This means that as long as you take action, you can use any item to hurt someone. After hurting someone, the item can be used again without restrictions.